I've been using Calibre for quite some time, almost as long as I've been reading on an Amazon Kindle, i.e. since last Fall. I'm a retired Professor of Classics, long at Washington University in St. Louis, now in the shadow of Mt. Mitchell in the Blue Ridge mountains of Western N.C. I'd like to understand better what I'm doing with Calibre and look to forum members here to clarify things for me. I'm glad to be aboard.